Online maintenance device for reverse osmosis security filter cartridge

Abstract

The utility model provides a kind of reverse osmosis security filter filter element on-line maintenance device, belong to water treatment technical field, comprising: bactericide medicine tank and dosing pump are connected by pipeline sequentially;The outlet of dosing pump is connected with the exhaust pipeline of security filter by dosing pipeline, the exhaust pipeline is connected with the exhaust port of security filter arranged at top, exhaust valve is equipped on the exhaust pipeline, the connecting place of dosing pipeline and exhaust pipeline is between exhaust port and exhaust valve;Check valve and medicine inlet regulating valve are sequentially equipped on dosing pipeline.The device carries out on-line sterilization maintenance to security filter filter element regularly, regularly, quantitatively, without disassembling security filter, greatly reduce workload, through bactericide, so that microbial contamination is effectively alleviated and controlled, prolongs the use cycle and cleaning cycle of security filter filter element, saves the procurement and replacement cost of filter element, realizes the long-period safe and stable economic operation of security filter and reverse osmosis equipment.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to an online maintenance device for reverse osmosis security filter cartridges. Background Technology

[0002] With my country's economic development, water scarcity has increasingly become a significant constraint on the country's national economic growth. Currently, power plant water treatment systems primarily use reclaimed water as their source. Due to the presence of various organic substances and pretreatment chemicals, the filter elements of reverse osmosis security filters in these systems are prone to severe microbial fouling, leading to increased operating pressure differentials and significantly reducing the lifespan of the security filters. Existing technologies generally do not incorporate filter element cleaning mechanisms for security filters. Both domestically and internationally, fouled filter elements are typically replaced directly as consumables. However, these expensive elements significantly increase the cost of replacing water treatment filtration materials—filter elements—and result in frequent replacements of security filter elements, reducing the effective treatment capacity of the water treatment system. A very small number of power plants remove the filter elements for simple offline cleaning and reuse, but this leads to frequent fouling, requires repeated disassembly and reassembly, and prevents the security filter from operating during cleaning, disrupting the normal water production process and severely impacting the safety and stability of the water treatment system. It is evident that power plants incur extremely high annual operating and maintenance costs for security filters, along with a significant workload for personnel, resulting in high water production costs and severely impacting the economic viability of power plant operations. Therefore, a safe, efficient device capable of online maintenance of reverse osmosis security filter cartridges is crucial for the production and operation of water treatment systems. Utility Model Content

[0003] This utility model provides an online maintenance device for reverse osmosis security filter cartridges, which solves the problems of short replacement cycles, high replacement costs, and large workload for disassembly and cleaning caused by easy clogging of security filter cartridges.

[0004] This utility model provides an online maintenance device for a reverse osmosis security filter element, comprising: a bactericide tank and a metering pump connected in sequence by pipes; the outlet of the metering pump is connected to the exhaust pipe of the security filter through a delivery pipe, the exhaust pipe is connected to the exhaust port of the security filter located at the top, the exhaust pipe is equipped with an exhaust valve, and the connection between the delivery pipe and the exhaust pipe is located between the exhaust port and the exhaust valve; a check valve and a drug inlet regulating valve are sequentially installed on the delivery pipe; the bactericide tank is used to store non-oxidizing bactericides.

[0005] Furthermore, the security filter is equipped with an inlet pipe and an outlet pipe. The inlet pipe is equipped with an inlet valve, and the outlet pipe is equipped with an outlet valve. The bottom of the security filter is equipped with a drain outlet, which is connected to the chemical wastewater pool through a drain pipe. The drain pipe is equipped with a drain valve.

[0006] Furthermore, the top of the disinfectant tank is equipped with a dosing port and a water inlet. The water inlet is connected to a water inlet pipe, which is connected to the public water supply network. The bottom of the disinfectant tank is equipped with a drain port, and the upper side wall of the disinfectant tank is equipped with an overflow port. The overflow port and the drain port are respectively connected to the wastewater pool of the disinfectant tank through pipes.

[0007] Furthermore, a water inlet valve is installed on the water inlet pipeline; a drain valve is installed at the drain outlet; and an overflow valve is installed at the overflow outlet.

[0008] Furthermore, the disinfectant tank is equipped with a first liquid level sensor, and the security filter is equipped with a second liquid level sensor.

[0009] Furthermore, the first liquid level sensor, the second liquid level sensor, the drug delivery metering pump, the drain valve, and the drug inlet regulating valve are all electrically connected to the controller.

[0010] Furthermore, two fungicide tanks are connected in parallel, and the types of non-oxidizing fungicides in the two fungicide tanks are different; the outlets of both fungicide tanks are connected to the inlet of the metering pump.

[0011] Furthermore, the outlet of the drug delivery metering pump is connected to the exhaust pipes of multiple security filters through a drug delivery pipeline, and the multiple security filters are arranged in parallel.

[0012] The online maintenance device for reverse osmosis security filter cartridges provided by this utility model has the following advantages: 1) This online filter cartridge maintenance device can perform regular, timed, and quantitative sterilization and maintenance on the reverse osmosis security filter cartridge online without disassembling the security filter, reducing the workload of operation and maintenance, effectively mitigating and controlling microbial contamination, significantly reducing the operating pressure differential of the security filter, reducing the maintenance workload and filter material cost caused by frequent filter cartridge replacement, greatly extending the service life of the security filter cartridge, reducing the frequency of filter cartridge replacement, greatly reducing the operating cost of the water treatment system, and improving the reliability and availability of water purification equipment.

[0013] 2) This filter element online maintenance device can use multiple bactericides alternately to improve the sterilization effect and prevent microorganisms from developing drug resistance; after soaking and sterilization, the security filter is cleaned by a forward flushing process, which can avoid backflushing that could cause filter element deformation and affect the normal use of the filter element; it is also suitable for single or multiple parallel security filters, and can selectively sterilize a single filter or multiple filters simultaneously according to the degree of contamination or usage of the security filter, which is convenient for controlling and eliminating microbial contamination of the filter element.

[0014] 3) The online filter maintenance device has a wide range of applications. Those skilled in the art can formulate bactericide solutions according to the types of pollutants in the filter. It is not limited to the non-oxidizing bactericides in this patent, but can also be applied to other bactericide solutions that can restore the flow rate of the filter. Moreover, the device does not change the original water treatment system equipment. It only adds pipes and their connection points, bactericide tanks, and metering pumps to the original pipeline. It has a small footprint, is easy to modify, has good application effect, and is easy to implement. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of an online maintenance device for a reverse osmosis security filter element provided in one embodiment of this utility model; Figure 2 A schematic diagram of the structure of an online maintenance device for a reverse osmosis security filter element provided in another embodiment of this utility model; Figure 3 A schematic diagram of the structure of an online maintenance device for a reverse osmosis security filter element provided in another embodiment of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Disinfectant tank; 2. Metering pump; 3. Security filter; 4. Wastewater tank; 11. Dosing port; 12. Inlet pipe; 13. Drain; 14. Overflow port; 15. First level sensor; 21. Delivery pipe; 22. Check valve; 23. Inlet regulating valve; 31. Exhaust pipe; 32. Exhaust port; 33. Exhaust valve; 34. Inlet valve; 35. Outlet valve; 36. Drain valve; 37. Second level sensor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are also within the protection scope of this utility model.

[0019] like Figure 1This utility model discloses an online maintenance device for a reverse osmosis security filter element, comprising: a bactericide tank 1 and a metering pump 2 connected sequentially by pipes; the outlet of the metering pump 2 is connected to the exhaust pipe 31 of the security filter 3 via a delivery pipe 21, the exhaust pipe 31 is connected to the exhaust port 32 located at the top of the security filter 3, the exhaust pipe 31 is equipped with an exhaust valve 33, and the connection between the delivery pipe 21 and the exhaust pipe 31 is located between the exhaust port 32 and the exhaust valve 33; a check valve 22 and a drug inlet regulating valve 23 are sequentially provided on the delivery pipe 21; the bactericide tank 1 is used to store non-oxidizing bactericides.

[0020] This online filter cartridge maintenance device uses a non-oxidizing bactericide to perform regular, timed, and quantitative online enhanced sterilization and maintenance on the security filter 3 cartridge. The bactericide is prepared and stored in the bactericide tank 1. When maintenance is required, it is delivered into the security filter 3 via the metering pump 2. The bactericide solution soaks and sterilizes the filter cartridge. After soaking, it is rinsed with water until no solution residue remains (to prevent the solution from affecting the subsequent reverse osmosis membrane and the quality of the filtered water), and then it can be put into operation. After restarting, the pressure differential of the security filter 3 cartridge is restored, and microbial contamination is effectively alleviated and controlled. The maintenance process is easy to implement, requiring no disassembly or reassembly of the security filter 3, significantly reducing workload, effectively extending the service life and cleaning cycle of the security filter 3 cartridge, saving on the purchase and replacement costs of the cartridge, and achieving long-term safe, stable, and economical operation of the security filter 3 and the reverse osmosis equipment.

[0021] Non-oxidizing bactericides kill bacteria by penetrating their cells, interfering with their metabolic processes, disrupting cell membranes, or forming complexes with bacterial components. They have a broad bactericidal spectrum, are less susceptible to interference from reducing substances, and have low corrosiveness to equipment. In production examples, non-oxidizing bactericides specifically include organic bromine compounds (such as 2,2-dibromo-3-hydantoinamide DBNPA) and isothiazolinones. Alternating use of multiple bactericides can improve the bactericidal effect while preventing microbial resistance from affecting the bactericidal efficacy.

[0022] In one embodiment, the security filter 3 is provided with an inlet pipe and an outlet pipe. The inlet pipe is provided with an inlet valve 34, and the outlet pipe is provided with an outlet valve 35. The bottom of the security filter 3 is provided with a drain outlet, which is connected to the chemical wastewater pool 4 through a drain pipe. The drain pipe is provided with a drain valve 36.

[0023] During the maintenance of the security filter 3, its inlet valve 34 and outlet valve 35 are closed. Only the disinfectant solution is used to soak and disinfect the security filter 3. After soaking, the disinfectant solution is sent to the chemical wastewater tank 4 through its bottom drain valve 36 and drain pipe. Then, the inlet valve 34 is opened to flush the security filter 3, preventing the disinfectant solution from entering the reverse osmosis system. A forward flushing process is used to clean the security filter 3, avoiding the deformation of the filter element caused by backflushing, which would affect its normal use. The flushing water is also discharged through the drain valve 36. After flushing until no disinfectant residue remains, the drain valve 36 is closed, and the outlet valve 35 is opened, allowing the security filter 3 to be put back into the water treatment system.

[0024] In one embodiment, the top of the disinfectant tank 1 is provided with a dosing port 11 and a water inlet. The water inlet is connected to a water inlet pipe 12, which is connected to a public water supply network. The bottom of the disinfectant tank 1 is provided with a drain port 13, and the upper part of the side wall of the disinfectant tank is provided with an overflow port 14. The overflow port 14 and the drain port 13 are respectively connected to the wastewater tank 4 via pipes. The disinfectant is added through the dosing port 11, and water is added to it through the water inlet and the water inlet pipe 12 to prepare a usable solution of suitable concentration. The overflow port 14 facilitates the level control of the solution in the disinfectant tank 1, and the drain port 13 facilitates the cleaning and drainage of the disinfectant tank 1.

[0025] In one embodiment, a water inlet valve is provided on the water inlet pipeline 12; a drain valve is provided at the drain outlet 13; and an overflow valve is provided at the overflow outlet 14. All valves are commonly used valves in the art and will not be described in detail here.

[0026] In one embodiment, the disinfectant tank 1 is equipped with a first liquid level sensor 15, and the security filter 3 is equipped with a second liquid level sensor 37.

[0027] In one embodiment, the first liquid level sensor 15, the second liquid level sensor 37, the drug delivery metering pump 2, the drain valve 36, and the drug inlet regulating valve 23 are electrically connected to the controller. The controller (a common device, not shown in the attached figure) and its control program (a common technique in the art, not described in detail here) can improve the degree of automation control of the device. A specific operational example is as follows: when the liquid level monitored by the first liquid level sensor 15 and the second liquid level sensor 37 is too low or too high, the controller controls the start and stop of the drug delivery metering pump 2 and / or the opening / closing of the drug inlet regulating valve 23. After the soaking time reaches the preset value, the control program uses the controller to control the drain valve 36 to open, and discharge the drug solution to the drug wastewater tank 4.

[0028] In one embodiment, such as Figure 2Two disinfectant tanks 1 are connected in parallel, and the two disinfectant tanks 1 contain different types of non-oxidizing disinfectants; the outlets of both disinfectant tanks 1 are connected to the inlet of the metering pump 2. In actual production, at least two different non-oxidizing disinfectants are used for maintenance and sterilization. This can be done with only one disinfectant tank 1, or with two parallel disinfectant tanks 1, each containing different disinfectants for alternating sterilization, thus avoiding mutual interference between the two solutions.

[0029] In one embodiment, such as Figure 3 The outlet of the metering pump 2 is connected to the exhaust pipes 31 of multiple security filters 3 via the delivery pipe 21, and the multiple security filters 3 are arranged in parallel. The reverse osmosis unit of the water treatment system is usually equipped with one or more security filters 3 connected in parallel. The metering pump 2 must be connected to each security filter 3, and can selectively sterilize one or multiple security filters simultaneously according to the degree of contamination or usage of the security filters 3, which is convenient for controlling and eliminating microbial contamination of the filter elements.

[0030] It should be noted that all metal and non-metal parts that come into contact with the liquid medicine are made of materials that are resistant to the corrosion of the corresponding liquid medicine, and all pipelines are made of UPVC pipes.

[0031] It should be noted that arrows without annotations in the attached diagrams indicate the direction of liquid flow.

[0032] The online maintenance device for the reverse osmosis security filter 3 cartridge operates as follows: Those skilled in the art can determine the online maintenance cycle for the reverse osmosis security filter 3 cartridge based on the water quality and operating parameters of the reverse osmosis unit. Taking once a week as an example, before maintenance, a bactericide is added to the bactericide tank 1 through the dosing port 11. Then, water is added through the water inlet and inlet pipeline 12 to prepare a usable solution of suitable concentration. Next, the operating security filter 3 is disconnected from the system, and the inlet valve 34, outlet valve 35, and vent valve 33 of the security filter 3 are closed. The drain valve 36 is also kept closed.

[0033] The controller opens the inlet regulating valve 23 and the drug delivery metering pump 2, and sends the drug solution into the security filter 3 through the drug delivery pipe 21 and the exhaust pipe 31. When the liquid level monitored by the first liquid level sensor 15 is too low or the liquid level monitored by the second liquid level sensor 37 is too high, the controller controls the drug delivery metering pump 2 to close and the inlet regulating valve 23 to close.

[0034] Soak the filter element in a bactericide solution for a period of time (e.g., 8-10 hours). After the soaking time reaches the preset value, the controller opens the drain valve 36, and the solution is discharged to the chemical wastewater tank 4 through the drain pipe. Then, the inlet valve 34 is opened to flush the security filter 3. The flushing water is also discharged through the drain valve 36. After flushing until no solution remains, the drain valve 36 is closed, and the outlet valve 35 is opened. The security filter 3 is then put back into the water treatment system according to the normal operating procedure.

[0035] After maintenance, the differential pressure of the security filter 3 under normal working condition can be maintained below 0.10MPa, saving on filter element replacement costs. A single security filter 3 contains four filter elements, each costing approximately 3,000 yuan, resulting in a saving of approximately 12,000 yuan in filter element replacement costs for a single security filter 3.

[0036] In actual production, at least two different non-oxidizing bactericides are used for maintenance and sterilization. It is possible to set up only one bactericide tank 1, or to set up two bactericide tanks 1 in parallel, with the other operating procedures being the same.

[0037] When the reverse osmosis unit is equipped with multiple parallel security filters 3, the drug delivery metering pump 2 must remain connected to each security filter 3. Depending on the degree of contamination or usage of the security filters 3, it can selectively sterilize one or multiple filters simultaneously. Other operating procedures are the same.

[0038] It should be noted that the detailed structure of some devices in this utility model is not described in detail, but belongs to the prior art known to those skilled in the art, and therefore will not be described again here. In addition, the parts of this device not described are the same as or can be implemented using existing technology.

[0039] It should be noted that those skilled in the art, under the guidance of this utility model, can also make some modifications to the design of the above system. For example, the equipment in the system is also equipped with level gauges, overflow / nitrogen pipelines, etc.; pumps, pressure sensors, flow meters or temperature sensors are installed on the conveying pipelines inside the system in different units or devices, and different valves, such as pressure relief valves, pressure regulating valves, safety valves, pneumatic valves, etc., are also installed to regulate and stabilize the pressure of the entire system, and the opening degree of the valves can also be adjusted to regulate the flow rate of materials in the pipeline, etc.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An apparatus for on-line maintenance of a reverse osmosis security filter cartridge, comprising: include: A fungicide tank and a metering pump are connected in sequence via pipes; the outlet of the metering pump is connected to the exhaust pipe of a security filter via a delivery pipe, and the exhaust pipe is connected to the exhaust port of the security filter located at the top. An exhaust valve is provided on the exhaust pipe, and the connection between the delivery pipe and the exhaust pipe is located between the exhaust port and the exhaust valve; a check valve and a drug inlet regulating valve are provided in sequence on the delivery pipe; the fungicide tank is used to store non-oxidizing fungicides.

2. The online service device for the reverse osmosis security filter cartridge according to claim 1, characterized in that, The security filter is equipped with an inlet pipe and an outlet pipe. The inlet pipe is equipped with an inlet valve, and the outlet pipe is equipped with an outlet valve. The bottom of the security filter is equipped with a drain outlet, which is connected to the chemical wastewater pool through a drain pipe. The drain pipe is equipped with a drain valve.

3. The online service device for a reverse osmosis security filter cartridge of claim 2, wherein, The top of the bactericide tank is provided with a dosing port and a water inlet. The water inlet is connected to a water inlet pipeline, which is connected to a public water supply network. The bottom of the bactericide tank is provided with a drain port, and the upper part of the side wall of the bactericide tank is provided with an overflow port. The overflow port and the drain port are respectively connected to the wastewater tank of the bactericide through pipes.

4. The online service device for the reverse osmosis security filter cartridge according to claim 3, characterized in that, A water inlet valve is provided on the water inlet pipeline; a drain valve is provided at the drain outlet; and an overflow valve is provided at the overflow outlet.

5. The online maintenance device for reverse osmosis security filter cartridges according to claim 2, characterized in that, The disinfectant tank is equipped with a first liquid level sensor, and the security filter is equipped with a second liquid level sensor.

6. The online service device for a reverse osmosis security filter cartridge of claim 5, wherein, The first liquid level sensor, the second liquid level sensor, the drug delivery metering pump, the drain valve, and the drug inlet regulating valve are all electrically connected to the controller.

7. The online service device for a reverse osmosis security filter cartridge according to claim 6, wherein Two disinfectant tanks are connected in parallel, and the two disinfectant tanks contain different types of non-oxidizing disinfectants; the outlets of both disinfectant tanks are connected to the inlet of the metering pump.

8. The online maintenance device for reverse osmosis security filter element according to claim 6, characterized in that, The outlet of the drug delivery metering pump is connected to the exhaust pipes of multiple security filters through a drug delivery pipe, and the multiple security filters are arranged in parallel.

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